Dual-Density CyberSkinà® Tip is firm on the inside, supple on the outside .Removable vibrating bullet.Extends penis and enlarges entire girth Smooth surface becomes slick when lubricated .Designed to wear during intercourse . Can be trimmed to a customized fit .Super stretchy to accommodate most men . Firm tip for easy penetration Phthalate & latex free Requires two AG13 batteries (included)Materials : TPR